[PATCH RFC 12/77] benet: Update MSI/MSI-X interrupts enablement code

Alexander Gordeev
2013-10-02T10:48:28Z

As result of recent re-design of the MSI/MSI-X interrupts enabling
pattern this driver has to be updated to use the new technique to
obtain a optimal number of MSI/MSI-X interrupts required.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
---
drivers/net/ethernet/emulex/benet/be_main.c | 38 ++++++++++++++------------
1 files changed, 20 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 3e2c834..84d560d 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -2366,29 +2366,23 @@ static int be_msix_enable(struct be_adapter *adapter)
else
num_vec = adapter->cfg_num_qs;

- for (i = 0; i < num_vec; i++)
- adapter->msix_entries[i].entry = i;
+ status = pci_msix_table_size(adapter->pdev);
+ if (status < 0)
+ goto fail;

- status = pci_enable_msix(adapter->pdev, adapter->msix_entries, num_vec);
- if (status == 0) {
- goto done;
- } else if (status >= MIN_MSIX_VECTORS) {
- num_vec = status;
- status = pci_enable_msix(adapter->pdev, adapter->msix_entries,
- num_vec);
- if (!status)
- goto done;
- } else (status > 0) {
+ num_vec = min(num_vec, status);
+ if (num_vec < MIN_MSIX_VECTORS) {
status = -ENOSPC;
+ goto fail;
}

- dev_warn(dev, "MSIx enable failed\n");
+ for (i = 0; i < num_vec; i++)
+ adapter->msix_entries[i].entry = i;
+
+ status = pci_enable_msix(adapter->pdev, adapter->msix_entries, num_vec);
+ if (status)
+ goto fail;

- /* INTx is not supported in VFs, so fail probe if enable_msix fails */
- if (!be_physfn(adapter))
- return status;
- return 0;
-done:
if (be_roce_supported(adapter) && num_vec > MIN_MSIX_VECTORS) {
adapter->num_msix_roce_vec = num_vec / 2;
dev_info(dev, "enabled %d MSI-x vector(s) for RoCE\n",
@@ -2400,6 +2394,14 @@ done:
dev_info(dev, "enabled %d MSI-x vector(s) for NIC\n",
adapter->num_msix_vec);
return 0;
+
+fail:
+ dev_warn(dev, "MSIx enable failed\n");
+
+ /* INTx is not supported in VFs, so fail probe if enable_msix fails */
+ if (!be_physfn(adapter))
+ return status;
+ return 0;
}

static inline int be_msix_vec_get(struct be_adapter *adapter,
--
1.7.7.6